Thanks Old Smokey.
Yes I should have mentioned that I was mostly talking about short sectors, where I didn't think using the initial cruise wind in CRZ WIND and entering all the leg winds would be much of an advantage compared to just using mean wind (I was with Cpt Know It All, recently upgraded from F/O Know It All, on a 1 hour flight!). I have used mean wind and descent winds so far and it seems to work fairly well.
Just moved to a base which has much longer sectors though, so I'll try and apply the techniques you described to see how much wind/fuel can be saved.
Thanks a lot for the input!
P